题目

Passport Control（护照验证处）If you are arriving at London Heathrow Airport and are not transferring to another flight outside Britain or Northern Ireland, you must pass through Passport Control and Customs immediately after leaving your plane. If you are not Britain or a citizen of the European Community（欧共体），you must fill out a special form before your passport is examined. This form is called a landing card and should be given to you during the flight to London.After landing, follow the ARRIVALS signs. Make sure you are in the right  channel when you reach Passport Cont中国航母辽宁舰是中国人民海军第一艘可以搭载固定翼飞机的航空母舰，满载排水量为67500吨，这个数据用科学记数法表示为（　　）A. 6.75×103吨 B. 6.75×10﹣4吨 C. 6.75×105吨 D. 6.75×104吨